What was found
(CAN) DURING CLIMBOUT FROM YOW AN ODOR SUSPECTED TO BE OF ENGINE FLUID ORIGIN WAS DETECTED IN THE PAX CABIN ALONG WITH A SLIGHT HAZE. THE AIRCRAFT RETURNED TO POINT OF DEPARTURE AND LANDED WITHOUT INCIDENT. INVESTIGATION REVEALED THE SOURCE OF THE PROBLEM WAS NR 3 ENGINE. THE DEFECT IS EXPECTED TO BE IDENTIFIED AT TEARDOWN AND WILL BE RELAYED WHEN AVAILABLE. TC: FOLLOW-UP / TEARDOWN REPORT EXPECTED FROM OPERATOR.